Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
In September, Llandybïe experiences a barely noticeable shift in meteorological conditions, with average high-temperatures moving from 17.5°C (63.5°F) in August to a still refreshing 16.4°C (61.5°F). Llandybïe records a mild decrease in temperature during the nights of September, averaging a cool 11.9°C (53.4°F).Humidity
In September, the average relative humidity in Llandybïe, United Kingdom, is 84%.Rainfall
In September, in Llandybïe, the rain falls for 17.5 days. Throughout September, 54mm (2.13") of precipitation is accumulated. In Llandybïe, during the entire year, the rain falls for 219.6 days and collects up to 745mm (29.33") of precipitation.Snowfall
In Llandybïe, snow does not fall in April through November.Daylight
In September, the average length of the day is 12h and 38min.On the first day of September, sunrise is at 6:29 am and sunset at 8:02 pm. On the last day of the month, sunrise is at 7:16 am and sunset at 6:55 pm BST.
Sunshine
The average sunshine in September is 7h.UV index
May through September, with an average maximum UV index of 4, are months with the highest UV index in Llandybïe. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for the average person.Note: In September, a daily UV index of 4 turns into the following recommendations:
Put precautions into practice - Ensuring skin and eye safety is a necessity. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Llandybïe?
What is the average humidity in September in Llandybïe?
How much does it rain in Llandybïe in September?
When it does not snow in Llandybïe?
What is the average length of the day in September in Llandybïe?
When are sunrise and sunset in September in Llandybïe?
How long on average sun shines in September in Llandybïe?
What is the month with the highest UV index in Llandybïe?
What is the UV index reading in September in Llandybïe?
Average temperature in September
Llandybïe, United Kingdom
- Average high temperature in September: 16.4°C
The warmest month (with the highest average high temperature) is July (17.8°C).
The month with the lowest average high temperature is February (7.7°C).
- Average low temperature in September: 11.9°C
The month with the highest average low temperature is August (13.6°C).
The coldest month (with the lowest average low temperature) is February (4.5°C).
Average pressure in September
Llandybïe, United Kingdom
- Average pressure in September: 1016.6mbar
The month with the highest atmospheric pressure is May (1016.7mbar).
The month with the lowest atmospheric pressure is November (1009.7mbar).
Average wind speed in September
Llandybïe, United Kingdom
- Average wind speed in September: 18.1km/h
The windiest month (with the highest average wind speed) is December (23.9km/h).
The calmest month (with the lowest average wind speed) is June (15.4km/h).
Average humidity in September
Llandybïe, United Kingdom
- Average humidity in September: 84%
The months with the highest relative humidity are January, August, October, November and December (85%).
The month with the lowest relative humidity is April (81%).
Average rainfall in September
Llandybïe, United Kingdom
- Average rainfall in September: 54mm
The wettest month (with the highest rainfall) is December (84mm).
The driest month (with the least rainfall) is May (37mm).
Average rainfall days in September
Llandybïe, United Kingdom
- Average rainfall days in September: 17.5 days
The month with the highest number of rainy days is December (21.5 days).
The month with the least rainy days is April (15.1 days).
Average snowfall in September
Llandybïe, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is December (8mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).
Average snowfall days in September
Llandybïe, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (1.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Llandybïe, United Kingdom
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 36min).
The month with the shortest days is December (Average daylight: 7h and 54min).
- Average sunshine in September: 7h and 0min
The months with the most sunshine are April and May (Average sunshine: 8h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in September
Llandybïe, United Kingdom
- Average sunshine days in September: 9.7 days
The month with the most sunshine days is May (12.8 days).
The month with the least sunshine days is August (6.5 days).
Average UV index in September
Llandybïe, United Kingdom
- Average UV index in September: 4
The months with the highest UV index are May, June, July, August and September (UV index 4).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Llandybïe, United Kingdom
- Average cloud cover in September: 51
The month with the most cloud cover is December (Cloud cover 63).
The months with the least cloud cover are April and May (Cloud cover 46).
Average visibility in September
Llandybïe, United Kingdom
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
Llandybïe, United Kingdom
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